Description: Featuring exquisite workmanship for tight threads and even force, and easy and convenient installation, this bike seatpost clamp won't waste your energy or time. A perfect accessory for bicycles, this bicycle seat tube clip is high strength, resistant to wear and tear, not easy to break, and fits snugly on the seat tube and will not slide off. It is constructed of aluminum alloy material. The upper inner diameter of this bicycle seat tube clamp is 3.18 cm, the lower inner diameter is 3.49 cm, and the height is 3.15 cm. This bicycle seat tube clamp is suitable for road bike and mountain bike. Item Name: Seatpost Clamp Material: Aluminum Alloy Features: Hollow Design, Wear-resistant, Anti-corrosion Size Details: Upper Inner Diameter: 3.18cm or 1.25" (Approx.) Lower Inner Diameter: 3.49cm or 1.37" (Approx.) Height: 3.15cm or 1.24" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Seatpost Clamp Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.